thepigeongenerator/mcaselector-lite
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fix: endianess was (often) converted after performing computations or missing completely.

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Quinn
2025-08-27 14:37:17 +02:00
parent 28dd8af353
commit f203cabad9
1 changed files with 5 additions and 5 deletions
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10
src/dat/mcx.c
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@@ -16,13 +16,13 @@ static size_t delchunk(u8 *restrict buf, size_t rmb, int sidx, int eidx) {
// load the table data // load the table data
u32 *table = (u32 *)buf; u32 *table = (u32 *)buf;
size_t slen, bidx, blen; size_t slen, bidx, blen;
slen = be32toh(table[sidx] & 0xFF); // acquire the sector length of the chunk slen = be32toh(table[sidx]) & 0xFF; // acquire the sector length of the chunk
bidx = be32toh(table[sidx] >> 8) * 0x1000; // acquire and compute the byte offset the chunk starts at bidx = (be32toh(table[sidx]) >> 8) * 0x1000; // acquire and compute the byte offset the chunk starts at
blen = slen * 0x1000; // compute the byte length of the chunk blen = slen * 0x1000; // compute the byte length of the chunk
// reset the table data // reset the table data
table[sidx] = 0; table[sidx] = 0;
table[sidx + 0x400] = time(NULL); // assign the current time to the timestamp, for correctness NOTE: might need to zero-out instead table[sidx + 0x400] = htobe32(time(NULL)); // assign the current time to the timestamp, for correctness NOTE: might need to zero-out instead
u8 *dst = buf + bidx - rmb; u8 *dst = buf + bidx - rmb;
u8 *src = buf + bidx + blen; u8 *src = buf + bidx + blen;
@@ -30,7 +30,7 @@ static size_t delchunk(u8 *restrict buf, size_t rmb, int sidx, int eidx) {
blen = 0; blen = 0;
for (sidx++; sidx < eidx; sidx++) { for (sidx++; sidx < eidx; sidx++) {
blen += be32toh(table[sidx] & 0xFF) * 0x1000; blen += be32toh(table[sidx] & 0xFF) * 0x1000;
table[sidx] -= htobe32(slen << 8); table[sidx] -= htobe32((rmb / 0x1000) << 8);
} }
memmove(dst, src, blen); memmove(dst, src, blen);
return rmb; return rmb;